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Posted to issues@spark.apache.org by "L. C. Hsieh (Jira)" <ji...@apache.org> on 2020/10/08 05:46:00 UTC

[jira] [Created] (SPARK-33092) Support subexpression elimination in ProjectExec

L. C. Hsieh created SPARK-33092:
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             Summary: Support subexpression elimination in ProjectExec
                 Key: SPARK-33092
                 URL: https://issues.apache.org/jira/browse/SPARK-33092
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.1.0
            Reporter: L. C. Hsieh
            Assignee: L. C. Hsieh


Users frequently write repeatedly expression in projection. Currently in ProjectExec, we don't support subexpression elimination in Whole-stage codegen. We can support it to reduce redundant evaluation.



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